app_list: Add search box and search result view for v2.

ui/app_list/search_box_view.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/app_list/search_box_view.h"
+
+#include <algorithm>
+
+#include "ui/app_list/search_box_model.h"
+#include "ui/app_list/search_box_view_delegate.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/views/controls/image_view.h"
+#include "ui/views/controls/textfield/textfield.h"
+
+namespace app_list {
+
+namespace {
+
+const int kPadding = 9;
+const int kIconDimension = 32;
+const int kPreferredWidth = 360;
+const int kPreferredHeight = 48;
+
+}  // namespace
+
+SearchBoxView::SearchBoxView(SearchBoxViewDelegate* delegate)
+    : delegate_(delegate),
+      model_(NULL),
+      icon_view_(NULL),
+      search_box_(NULL),
+      grid_view_(NULL),
+      results_view_(NULL) {
+  icon_view_ = new views::ImageView;
+  AddChildView(icon_view_);
+
+  search_box_ = new views::Textfield;
+  search_box_->RemoveBorder();
+  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
+  search_box_->SetFont(rb.GetFont(ResourceBundle::BaseFont).DeriveFont(
+        2, gfx::Font::BOLD));
+  search_box_->SetController(this);
+  AddChildView(search_box_);
+}
+
+SearchBoxView::~SearchBoxView() {
+  if (model_)
+    model_->RemoveObserver(this);
+}
+
+void SearchBoxView::SetModel(SearchBoxModel* model) {
+  if (model_ == model)
+    return;
+
+  if (model_)
+    model_->RemoveObserver(this);
+
+  model_ = model;
+  if (model_) {
+    model_->AddObserver(this);
+    IconChanged();
+    HintTextChanged();
+  }
+}
+
+gfx::Size SearchBoxView::GetPreferredSize() {
+  return gfx::Size(kPreferredWidth, kPreferredHeight);
+}
+
+void SearchBoxView::Layout() {
+  gfx::Rect rect(GetContentsBounds());
+  if (rect.IsEmpty())
+    return;
+
+  gfx::Size icon_size(kIconDimension, kIconDimension);
+  gfx::Rect icon_frame(rect);
+  icon_frame.set_width(icon_size.width() + 2 * kPadding);
+  icon_view_->SetBoundsRect(icon_frame);
+
+  gfx::Rect edit_frame(rect);
+  edit_frame.set_x(icon_frame.right());
+  edit_frame.set_width(rect.width() - icon_frame.width() - kPadding);
+  search_box_->SetBoundsRect(edit_frame);
+}
+
+void SearchBoxView::UpdateModel() {
+  // Temporarily remove from observer to ignore notifications caused by us.
+  model_->RemoveObserver(this);
+  model_->SetText(search_box_->text());
+
+  gfx::SelectionModel sel;
+  search_box_->GetSelectionModel(&sel);
+  model_->SetSelectionModel(sel);
+  model_->AddObserver(this);
+}
+
+void SearchBoxView::NotifyQueryChanged() {
+  DCHECK(delegate_);
+  delegate_->QueryChanged(this);
+}
+
+void SearchBoxView::ContentsChanged(views::Textfield* sender,
+                                    const string16& new_contents) {
+  UpdateModel();
+  NotifyQueryChanged();
+}
+
+bool SearchBoxView::HandleKeyEvent(views::Textfield* sender,
+                                   const views::KeyEvent& key_event) {
+  bool has_query = !search_box_->text().empty();
+
+  // Escape with non-empty query text clears the search box.
+  if (has_query && key_event.key_code() == ui::VKEY_ESCAPE) {
+    search_box_->SetText(string16());
+    // Updates model and fires query changed manually because SetText above
+    // does not generate ContentsChanged notification.
+    UpdateModel();
+    NotifyQueryChanged();
+    return true;
+  }
+
+  bool handled = false;
+  if (has_query) {
+    if (results_view_ && results_view_->visible())
+      handled = results_view_->OnKeyPressed(key_event);
+  } else {
+    if (grid_view_ && grid_view_->visible())
+      handled = grid_view_->OnKeyPressed(key_event);
+  }
+
+  return handled;
+}
+
+void SearchBoxView::IconChanged() {
+  icon_view_->SetImage(model_->icon());
+}
+
+void SearchBoxView::HintTextChanged() {
+  search_box_->set_placeholder_text(model_->hint_text());
+}
+
+void SearchBoxView::SelectionModelChanged() {
+  search_box_->SelectSelectionModel(model_->selection_model());
+}
+
+void SearchBoxView::TextChanged() {
+  search_box_->SetText(model_->text());
+}
+
+}  // namespace app_list
+